Diaphragm and method of making the same.



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"the alknli i'errooyunids and l'mricyunid's.

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DIAPHRAGM AND ME'ZTHGID F TMZAZJ Application filed October 3,

To all 10. mm it may cmIcw-n: l Be it known that l, HEINRICH llnrrz, asubject of the Emperor of Gcrnniny, residing l at No. liingtlon road,ll'ostllanipsteiul, in the county of Illiddlescx, England, chcmisl, l

have invented certain new and useful Int-- movements in Diaphragms andMethods ol' ills-king the Same, of which the following is aspecification.

Diaphragms for electrolytic cclls unule of various kinds of fabric suchas asbestos cloth, l nit 'ntod cotton cloth or the like are satisfactoryin respect ol the *l'zu-t that they oller comparatively little resstance to the passage of the electric current, but they are not cllilcient in respect of their permeability to cloctrolytes which are to hekept separate.

My invention relates to fabrics and a. method of modifying the Stuntwhen designed. to be usoil for tho purpose in questii'm by impregnatingthorn successively and if necessary repeatedly with a solution of adouble cynnitl or a mixture of double cynnids and a solution of ametallic salt or mixture of metallic snlts, the double cyunid andmetallic salt being such that when the solutions lllQG-l. in the fabrica deposit is lcrnicd in the pores thereof which has the desired clienton tho permeability of the fabric.

Particularly suitable for the invention are For instance a textilediaphragm of asbestos cloth may bo dipped into :1 solution oi nlknlil'errocyunid orlerricynnid and then into n solution of copper sulfate.

Vl hcn the diaphragm is to be uscd for an cloctroiytic cell wherein asolution. 01 :1 molzillic suit that iornis an insoluble doublc cynnid isto bo (llft'l'l'Ulyiit-ltl it is njcl'vrublc to usov a solution ol thissnlt. us one ol lhosc with which the i'lull! is in be iinprngnnitcd and:1 siinph: nnuuu-r of doing this is to sntrurulc the cloth first with aconcentrated solution ol' alkali lorroc viuiid or 'l'crricynnid and thouvitlu-r bcl'orc or zd'tcr it hus dried. to phu'c il in )osilion in thcsolution in tin (!lQClIUl \'l'h-, cull whcrcupon lhc desired depositionoccurs whilc the cloth in place.

ilnving thus described the nature ol' my said invention and the bestmeans I lino-c: of carrying lhc same into practical ell- \';lLLlll1I 1 Aprocess 'l'or modifying textile l'ah-vics that are to be used. asdisphrugins in cleclrolytic calls consisting in iinprc noting; tho 2fabric sucoessively with a solution u'i' a tlou- Specification ofLetters Patent.

Ul WEST l'lAIilPS'liiil). lih tllulh' l Patented April 1:?08.

2. .1 diaphragm for use in an clootrolytic coll consisting of itsuitable textile lulu" ingdepositcd in it an insoluble double 'lilllll,substuntinllv as dsscribcil.

3. A diaphragm for use in electrolytic cell wherein n solution of ametal yielding {LE1 insoluble double oyzinial is to he clsct-rolyzed,consisting of a. s llllullli textile 'lsb having deposited in it suchdouble cynuid of tho said metal, substantially 1:; dcscrihed.

l. The process of nnniul'n: tiring div: plungins lc-r elsctrolytic c llswhich consists in subjecting a suitnblc toxtilc fabric to the combinedaction of soluhlc double mid and a metallic salt, c umble oi uniti! withthe cynnid and forming u seinipcrinczihlc nioinbranc, substantially asdcscribcd.

5. Tho process of mainilzu-turi 5; dinphrngms for cloctrol l'lii cellswhim con 'st in stir nnrcgnating n suilziblz: textile fabric lution of adoublc cynnid :unl thcu subjhcting thc saint? to the action of :1niolllllltl salt, capable of uniting with thc cyitilltl and forniiiu: ascnipcrnicublc mom-- brnnc subs-tuntin-ll as (ha ihctli (3. The proccssoi" nuni phrugins for clcctrolyl ll, culls 'rcui n suitnhlc tcxtilc lzihric which cm in iii'sl. {routing tho fabric with n solution cl :idouble cyunid and :uihscuucnlly with :1 solution ol' :1 lilltillllt')Salli, cnpnhlc oi uniting with lll'. cyunid and forming :1- Itngcruicnhlc XHPIII hrnnc substantially tl(S('lil)(ll.

T. The proccss of munul'ucturing )lil'il lj' l'ur chcirulvtic cullswhich con: 11) treating it suitnblc lcsitilu fabric with :in alkalitcrrocyuiihl and snbsrquvnllv with n metallic suit cupnhln ol' unitingwith thc l'crrocyzuiid and forming u scininci'ni nhlc nicnibrnno, sulstfiiliillli) us :lcsriibcd.

PS The prom ol' mnnuhu-luringg dinphrnguis l'cr clwtrolytic 'vclls fromu iitahlc tcxtilc lnbric -which consists in incororntiug in such l'nhricu scinipcrincnblc nionmrsnc of an insolublc doublc cyanid,suhstnnlizillv as dcscribcd.

9. Thu proccss of nmmilncluring dinphrngnis For clcci'rolytic cells from21, suitz'zhlc toxtilc fabric whicu consists uw'wiornliug in such'fnbrio n scnnpnrincin cinln'uuc ul' fex ur-yuniil of (-oppot', suuntinll us ill s ribed.

it), fl iliuphrns'm l'ui'cirvi rolytic Polls coin inclining dim;

senses prising e textile fabric having incorporated 13. A diaphragm foruse in electrolytic therein a semipermeable membrane of an cells,consisting of a textile fabric containing insoluble double cyanid,substantially as a double cyenid, substantially as described. described.14. A diziplim in for use in electrolytic 11. A diaphragm lcrelectrolytic cells com cells, consisting 0" a textile fabric containing20 prising n textile fabric having incorporated an. alkaline cyenidl ofiron, substantially as therein ii semipermeable membrane offerdescribed.

rocyenid of copper, Substantially de- In testimony whereof I have signedmy v scribed, name to the specification in the presence of i0 12. Adiaphragm for use in electrolytic two subscribing witnesses.

cells, consisting of e textile fabric containing an insoluble chemicalagent, said agent being one of a plurality of chemical agents which 1;llitnesses:

when combined produce a semipermeable T. Jv OSMAN, la inen'ibiiine,sulistan'iizillv as described. JOSEPH MiLLARD

